ix/iterable/operators/union.js

The Interactive Extensions for JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.union = exports.UnionIterable = void 0;
const iterablex_js_1 = require("../iterablex.js");
const arrayindexof_js_1 = require("../../util/arrayindexof.js");
const comparer_js_1 = require("../../util/comparer.js");
/** @ignore */
class UnionIterable extends iterablex_js_1.IterableX {
    constructor(left, right, comparer) {
        super();
        this._left = left;
        this._right = right;
        this._comparer = comparer;
    }
    *[Symbol.iterator]() {
        const map = [];
        for (const lItem of this._left) {
            if ((0, arrayindexof_js_1.arrayIndexOf)(map, lItem, this._comparer) === -1) {
                map.push(lItem);
                yield lItem;
            }
        }
        for (const rItem of this._right) {
            if ((0, arrayindexof_js_1.arrayIndexOf)(map, rItem, this._comparer) === -1) {
                map.push(rItem);
                yield rItem;
            }
        }
    }
}
exports.UnionIterable = UnionIterable;
/**
 * Produces the set union of two sequences by using the given equality comparer.
 *
 * @template TSource The type of the elements of the input sequences.
 * @param {AsyncIterable<TSource>} right An iterable sequence whose distinct elements form the second set for the union.
 * @param {((x: TSource, y: TSource) => boolean)} [comparer=defaultComparer] The equality comparer to compare values.
 * @returns {MonoTypeOperatorFunction<TSource>} An iterable sequence that contains the elements from both input sequences,
 * excluding duplicates.
 */
function union(right, comparer = comparer_js_1.comparer) {
    return function unionOperatorFunction(left) {
        return new UnionIterable(left, right, comparer);
    };
}
exports.union = union;

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